Last weekend I changed all flexible brake pipes and replaced the fluid with ATE Super Blue. I used the following spanners;
Brake spanner (flare nut spanner) 11mm
Brake hose (top) 17mm
Brake hose (to caliper) 14mm
Bleed nipple (rear) 11mm
Bleed nipple (front) 8mm
I removed most of the dust and grime (carefully) with a wire brush then sprayed the connections with PlusGas and allowed it to soak for 5 minutes or so.
I removed the retaining clip using a heavy duty adjustable wrench, the deep grooves in the jaws made removing the clip easy. Then using the flare nut spanner and 17mm spanner broke the top connection, this needs to be done carefully as not to twist the rigid pipework. I used the flare nut spanner "upside-down" so the effort to move the spanner was closely aligned to the lower spanner. With the hose freed I undid the connection to the caliper.
Re-assembly was a reversal of the removal, making sure the caliper connection is tight before attempting the top connection otherwise the flexi can be twisted.
Then there is the bleeding! No problems there, the use of a blue fluid makes life so much easier!
Hope that is of use.
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